Patents by Inventor Takahiro Bamba
Takahiro Bamba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11946480Abstract: A centrifugal compressor includes: a housing including an intake flow path; a compressor impeller arranged in the intake flow path; a movable portion arranged upstream of the compressor impeller in a flow of an intake air; and a groove formed in an area other than a surface located on a downstream side in the flow of the intake air in the movable portion.Type: GrantFiled: June 16, 2022Date of Patent: April 2, 2024Assignee: IHI CorporationInventors: Atsushi Yonemura, Ryota Sakisaka, Yudai Kaneko, Takahiro Bamba
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Patent number: 11885343Abstract: A centrifugal compressor includes: a housing including an intake flow path; a compressor impeller disposed in the intake flow path; an accommodation chamber formed upstream of the compressor impeller in the housing; a movable member disposed in the accommodation chamber and configured to be movable between a retracted position where the movable member is retracted from the intake flow path and a protruding position where the movable member protrudes from the accommodation chamber into the intake flow path, the protruding position being located closer to the intake flow path with respect to the retracted position, and a contacting portion and a non-contacting portion provided on an accommodation chamber opposing surface of the accommodation chamber, the accommodation chamber opposing surface being positioned upstream of the movable member, the contacting portion being contactable with the movable member, the non-contacting portion being non-contactable with the movable member.Type: GrantFiled: December 13, 2021Date of Patent: January 30, 2024Assignee: IHI CorporationInventors: Ryota Sakisaka, Takashi Fujiwara, Atsushi Yonemura, Takahiro Bamba
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Patent number: 11821432Abstract: A centrifugal compressor includes: an impeller including a main body portion and a plurality of blades provided on an outer peripheral surface of the main body portion; an intake flow path facing the impeller in a rotational axis direction; and a throttling mechanism including a throttling member provided in the intake flow path, a ratio obtained by dividing a distance between an outer peripheral end of a leading edge of the blade and the throttling member by a maximum protruding height of the throttling member protruding from an inner wall surface of the intake flow path is equal to or less than 4.Type: GrantFiled: October 1, 2021Date of Patent: November 21, 2023Assignee: IHI CorporationInventors: Atsushi Yonemura, Ryota Sakisaka, Takashi Fujiwara, Takahiro Bamba
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Patent number: 11754093Abstract: A centrifugal compressor includes a compressor housing; a compressor impeller; a first throttling member and a second throttling member; a contacting portion provided on one end of a body of each of the first throttling member and the second throttling member; and an opposing portion provided on the other end of the body of each of the first throttling member and the second throttling member, the opposing portions being spaced apart from each other in a circumferential direction and parts of the opposing portions facing each other in a rotational axis direction when both of the first throttling member and the second throttling member are in a protruding position.Type: GrantFiled: January 4, 2022Date of Patent: September 12, 2023Assignee: IHI CorporationInventors: Ryota Sakisaka, Takashi Fujiwara, Atsushi Yonemura, Takahiro Bamba
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Patent number: 11460047Abstract: A centrifugal compressor includes: a compressor housing in which an intake passage is formed; a compressor impeller provided in the intake passage; an actuator that causes a rod to linearly move in a direction intersecting with a rotation axis direction of the compressor impeller; a connection member connected to the rod; a throttle member including a protruding portion; a connection shaft extending in the rotation axis direction and connecting the connection member and the throttle member; and a rotation shaft extending in a direction parallel to the connection shaft and serving as a rotation center of the throttle member.Type: GrantFiled: December 9, 2020Date of Patent: October 4, 2022Assignee: IHI CorporationInventors: Ryota Sakisaka, Takashi Fujiwara, Atsushi Yonemura, Wataru Ueda, Hiroshi Saito, Yusei Yokoyama, Takahiro Bamba
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Publication number: 20220307510Abstract: A centrifugal compressor includes: a housing including an intake flow path; a compressor impeller arranged in the intake flow path; a movable portion arranged upstream of the compressor impeller in a flow of an intake air; and a groove formed in an area other than a surface located on a downstream side in the flow of the intake air in the movable portion.Type: ApplicationFiled: June 16, 2022Publication date: September 29, 2022Applicant: IHI CorporationInventors: Atsushi YONEMURA, Ryota SAKISAKA, Yudai KANEKO, Takahiro BAMBA
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Publication number: 20220120289Abstract: A centrifugal compressor includes a compressor housing; a compressor impeller; a first throttling member and a second throttling member; a contacting portion provided on one end of a body of each of the first throttling member and the second throttling member; and an opposing portion provided on the other end of the body of each of the first throttling member and the second throttling member, the opposing portions being spaced apart from each other in a circumferential direction and parts of the opposing portions facing each other in a rotational axis direction when both of the first throttling member and the second throttling member are in a protruding position.Type: ApplicationFiled: January 4, 2022Publication date: April 21, 2022Applicant: IHI CorporationInventors: Ryota SAKISAKA, Takashi FUJIWARA, Atsushi YONEMURA, Takahiro BAMBA
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Publication number: 20220099101Abstract: A centrifugal compressor includes: a housing including an intake flow path; a compressor impeller disposed in the intake flow path; an accommodation chamber formed upstream of the compressor impeller in the housing; a movable member disposed in the accommodation chamber and configured to be movable between a retracted position where the movable member is retracted from the intake flow path and a protruding position where the movable member protrudes from the accommodation chamber into the intake flow path, the protruding position being located closer to the intake flow path with respect to the retracted position, and a contacting portion and a non-contacting portion provided on an accommodation chamber opposing surface of the accommodation chamber, the accommodation chamber opposing surface being positioned upstream of the movable member, the contacting portion being contactable with the movable member, the non-contacting portion being non-contactable with the movable member.Type: ApplicationFiled: December 13, 2021Publication date: March 31, 2022Applicant: IHI CorporationInventors: Ryota SAKISAKA, Takashi FUJIWARA, Atsushi YONEMURA, Takahiro BAMBA
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Publication number: 20220099107Abstract: A centrifugal compressor includes: a housing including an intake flow path; a compressor impeller disposed in the intake flow path; a circulation flow path provided radially outside the intake flow path and connected to the intake flow path at a downstream position that radially faces the compressor impeller and at an upstream position that is upstream of the downstream position with respect to the compressor impeller; and a movable member disposed at the upstream position and including a body portion having a protruding portion, the movable member being movable between a protruding position where the circulation flow path is closed by the body portion and the protruding portion is located in the intake flow path, and a retracted position where the protruding portion is retracted from the intake flow path and the circulation flow path is connected to the intake flow path.Type: ApplicationFiled: December 13, 2021Publication date: March 31, 2022Applicant: IHI CorporationInventors: Atsushi YONEMURA, Ryota SAKISAKA, Takashi FUJIWARA, Takahiro BAMBA
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Publication number: 20220018360Abstract: A centrifugal compressor includes: an impeller including a main body portion and a plurality of blades provided on an outer peripheral surface of the main body portion; an intake flow path facing the impeller in a rotational axis direction; and a throttling mechanism including a throttling member provided in the intake flow path, a ratio obtained by dividing a distance between an outer peripheral end of a leading edge of the blade and the throttling member by a maximum protruding height of the throttling member protruding from an inner wall surface of the intake flow path is equal to or less than 4.Type: ApplicationFiled: October 1, 2021Publication date: January 20, 2022Applicant: IHI CorporationInventors: Atsushi YONEMURA, Ryota SAKISAKA, Takashi FUJIWARA, Takahiro BAMBA
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Publication number: 20210088054Abstract: A centrifugal compressor includes: a compressor housing in which an intake passage is formed; a compressor impeller provided in the intake passage; an actuator that causes a rod to linearly move in a direction intersecting with a rotation axis direction of the compressor impeller; a connection member connected to the rod; a throttle member including a protruding portion; a connection shaft extending in the rotation axis direction and connecting the connection member and the throttle member; and a rotation shaft extending in a direction parallel to the connection shaft and serving as a rotation center of the throttle member.Type: ApplicationFiled: December 9, 2020Publication date: March 25, 2021Applicant: IHI CorporationInventors: Ryota SAKISAKA, Takashi FUJIWARA, Atsushi YONEMURA, Wataru UEDA, Hiroshi SAITO, Yusei YOKOYAMA, Takahiro BAMBA
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Patent number: 10837448Abstract: A counter-rotating axial flow fan includes a first fan including a first impeller including first blades radially arranged around a predetermined central axis, a first motor rotating the first impeller around the central axis, and a first case surrounding an outer periphery of the first impeller, and a second fan including a second impeller including second blades radially arranged around the central axis, a second motor rotating the second impeller around the central axis, and a second case surrounding an outer periphery of the second impeller. End surfaces of the first and second cases contact each other at a first position in an axial direction, the first and second motors face in opposite directions from each other in the axial direction, and end surfaces of the first and second motors are opposite to each other at a second position that differs from the first position.Type: GrantFiled: March 15, 2019Date of Patent: November 17, 2020Assignee: NIDEC SERVO CORPORATIONInventors: Yoshihiko Kato, Takahiro Bamba, Yoshihisa Kagawa, Takanori Abe
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Publication number: 20190301472Abstract: A counter-rotating fan includes a first fan including a first impeller including first blades radially arranged around a predetermined center axis, a first motor that rotates the first impeller around the center axis, and a first case surrounding an outer circumference of the first impeller, and a second fan including a second impeller including second blades radially arranged around the center axis, a second motor that rotates the second impeller around the center axis, and a second case surrounding an outer circumference of the second impeller. The first blades include a front edge located foremost in a rotation direction and a rear edge located rearmost in the rotation direction. A radially outermost end of the rear edge is located closer to the second fan than a radially innermost end.Type: ApplicationFiled: February 12, 2019Publication date: October 3, 2019Inventors: Yoshihiko KATO, Takahiro BAMBA, Yoshihisa KAGAWA, Takanori ABE
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Publication number: 20190301473Abstract: A counter-rotating axial flow fan includes a first fan including a first impeller including first blades radially arranged around a predetermined central axis, a first motor rotating the first impeller around the central axis, and a first case surrounding an outer periphery of the first impeller, and a second fan including a second impeller including second blades radially arranged around the central axis, a second motor rotating the second impeller around the central axis, and a second case surrounding an outer periphery of the second impeller. End surfaces of the first and second cases contact each other at a first position in an axial direction, the first and second motors face in opposite directions from each other in the axial direction, and end surfaces of the first and second motors are opposite to each other at a second position that differs from the first position.Type: ApplicationFiled: March 15, 2019Publication date: October 3, 2019Inventors: Yoshihiko KATO, Takahiro BAMBA, Yoshihisa KAGAWA, Takanori ABE
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Patent number: 10400789Abstract: In a compressor, comprising a housing including a flow-through air guiding section with an inlet duct, a wheel chamber formed downstream of the inlet duct for accommodating a compressor wheel, and a spiral duct formed downstream of the wheel chamber, wherein flow slots are formed in a transition region connecting the inlet duct with the wheel chamber, and the transition region extends both in the directions of the inlet duct and of the wheel chamber along a leading edge of the compressor wheel, the flow slots each extend along an axial first length (L1) and along a radial length (RL) with a cross-section (Q), which cross-section (Q) changes over the axial first length (L1) of the flow slots.Type: GrantFiled: March 23, 2017Date of Patent: September 3, 2019Assignee: CHARGING SYSTEMS INTERNATIONAL GMBHInventors: Peter Harley, Andre Starke, Takahiro Bamba
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Publication number: 20190186495Abstract: A blower includes a motor and an impeller. The motor includes a rotor cup that includes a first cylindrical portion that has a cylindrical shape and that holds the rotor magnet. The impeller includes an impeller cup including a cylindrical second cylindrical portion that surrounds the first cylindrical portion on an outer side of the rotor cup in the radial direction, and blade portions on a radial-direction outer surface of the second cylindrical portion. The rotor cup includes a flange portion that protrudes outward in the radial direction from a lower portion of the first cylindrical portion. Of the flange portion and the impeller cup, one includes a first hole portion recessed in an axial direction, and the other includes a first protruding portion at least partially located inside the first hole portion.Type: ApplicationFiled: June 23, 2017Publication date: June 20, 2019Applicant: NIDEC SERVO CORPORATIONInventors: Takahiro BAMBA, Taro TANNO, Yoshihiko KATO
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Patent number: 10273973Abstract: A centrifugal compressor includes an asymmetric self-recirculating casing treatment that includes, on an inner face of a casing 10, a suction ring groove 1, a ring guide channel 2 and a back-flow ring groove 3 to form a self-recirculating channel. An axial distance Sr from an upstream end face of the suction ring groove 1 to an impeller full blade leading edge 4 or a width br of the suction ring groove 1 is represented as A·sin(?+?0)+A0 and is distributed in a sinusoidal shape in a circumferential direction, an initial phase angle ?0 is in a range of 0°??0?360°, and a circumferential angle ? of the casing 10 has a definition range of ?0????0+360°. In the expression, A denotes amplitude of distribution of the axial distance Sr or the width br, and A0 denotes an average of the axial distance Sr or the width br.Type: GrantFiled: February 3, 2011Date of Patent: April 30, 2019Assignees: IHI CORPORATION, TSINGHUA UNIVERSITYInventors: Xinqian Zheng, Yun Lin, Yangjun Zhang, Mingyang Yang, Takahiro Bamba, Hideaki Tamaki
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Patent number: 9816522Abstract: A centrifugal compressor has a casing 7. In the casing 7 is formed a back-flow channel 9 to return fluid from a downstream position of an impeller full blade leading edge 6a to an upstream position of the impeller full blade leading edge 6a. The back-flow channel 9 includes a suction ring groove 9a and a back-flow ring groove 9b. The suction ring groove opens at the downstream position on the inner face 7a of the casing 7, and extends in the circumferential direction. The back-flow ring groove opens at the upstream position on the inner face 7a, and extends in the circumferential direction. Distribution in the circumferential direction of the axial-direction position of the suction ring groove 9a or a width of the suction ring groove 9a is asymmetric with reference to the rotation axis.Type: GrantFiled: February 3, 2011Date of Patent: November 14, 2017Assignees: IHI CORPORATION, TSINGHUA UNIVERSITYInventors: Xinqian Zheng, Yun Lin, Yangjun Zhang, Mingyang Yang, Takahiro Bamba, Hideaki Tamaki
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Publication number: 20170191496Abstract: In a compressor, comprising a housing including a flow-through air guiding section with an inlet duct, a wheel chamber formed downstream of the inlet duct for accommodating a compressor wheel, and a spiral duct formed downstream of the wheel chamber, wherein flow slots are formed in a transition region connecting the inlet duct with the wheel chamber, and the transition region extends both in the directions of the inlet duct and of the wheel chamber along a leading edge of the compressor wheel, the flow slots each extend along an axial first length (L1) and along a radial length (RL) with a cross-section (Q), which cross-section (Q) changes over the axial first length (L1) of the flow slots.Type: ApplicationFiled: March 23, 2017Publication date: July 6, 2017Applicant: IHI CHARGING SYSTEMS INTERNATIONAL GMBHInventors: Peter HARLEY, Andre STARKE, Takahiro BAMBA
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Patent number: 9234526Abstract: A centrifugal compressor includes an asymmetric self-recirculating casing treatment that includes, on an inner face of a casing 10, a suction ring groove 1, a ring guide channel 2 and a back-flow ring groove 3 to form a self-recirculating channel. An axial-direction position Sr from an upstream end face of the suction ring groove to an impeller full blade leading edge 4 or a width br of the suction ring groove 1 is represented as A(?·D??·D)2+A0 and is distributed in a parabolic shape in a circumferential direction. An initial phase angle ?0 is in a range of 0??0?2?. A circumferential angle ? of the casing has a definition range of ?0????0+2?. In the expression, A denotes a parameter of the parabola in the axial-direction position Sr or the width br, and A0 denotes an extreme of the axial-direction position Sr or the width br when corresponding circumferential angle ? and the ? are equal at an extreme point of distribution of the parabola.Type: GrantFiled: February 3, 2011Date of Patent: January 12, 2016Assignees: TSINGHUA UNIVERSITY, IHI CORPORATIONInventors: Xinqian Zheng, Yun Lin, Yangjun Zhang, Mingyang Yang, Takahiro Bamba, Hideaki Tamaki